vm-68 q's

ok so i was workin the field today and a guy came up to me with his gun to chrono. i could tell it was old but wasnt sure what it was. i chronod it and the thing kicked like a real gun. it scared the **** outta me. and then it would even register on the chrono because it was shooting so low, and the guy had bought it from a pawn shop and didnt know how to mess with the velocity...
so questions:
1. is this the right forum?
2. where the crap is the velocity adjustment if there is one?
3 did people actually play with those cannons?

btw it was pretty cool to hold one though and look at far we have come in just since the 80's(i think).

agreed with above post.
the velocity can be adjusted with a hex (don't remember what size) down the barrel in increments.

if it's shooting really low, you need to take the marker apart and turn the valve position. The valve on a VM has 4 positions with different sized holes to regulate the amount of air flowing through it. Adjusting this requires a special valve tool.

yes, lots of people used to have the VM. i used to rock one through the early 90's and i guess a fair amount of guys still rock them at scenarios.

You don't need a special tool to adjust the valve.
You can do it with a very long 1/4" bolt.

But, if the FPS is lower then it should be, there is lots of small things that can cause that to happen.

Like, the valve FPS adjustment needs to be set at a "click". If it is between "clicks", it will have low FPS.
If the valve screws are replaced with screws that are extra long, then you will get low FPS. If you are missing the spring guide, or bumper, or if the nubbins are bad, or if the orings are bloated, they all cause low FPS.

I wrote that massive VM FAQ at the www.vm68.com site, though the site is run by Chris Mader. He knows just about everything there is to know.

Let me put it this way: You will never need an electronic hopper on a VM. It has enough recoil that it agitates the balls in the hopper just by firing it.

First marker that I ever bought new was an EXC-68 and it still works today. The VM and EXC are also among the few markers you could use to club a mountain lion to death if need be. It is heavy as a tank. I think it is probably heavier than an M16.

ahhhh the vm.
I shot one in the 90s as well as my brother and dad.
the team we played with shot vms with sp barrels ( the 2 pieces that didnt come apart )
then me and brother got puma and bobcat. then mags. then quit for about 10 years and for the last 2 seasons have been playing div3 local tournys with mags (2005) and ions(2006).
just rambling......the vm is one hell of a gun. Ive got one in parts in a bag (one with the expansion chamber) I removed the expansion chamber and lost parts to it so it is now a regular vm but the bolt wont return. it shot fine but low for a day. then it just started going *click* and no air release. bolt sticking forward. I lubed then it went full auto all the time ( like its out of air )
so its in pieces again and waiting for me to get off my *** and get a stronger spring ( hitting valve harder releasing more air in my best guess) any other ideas? its been a while since ive teched one of these tanks.